diff options
Diffstat (limited to 'runsc/mitigate')
| -rw-r--r-- | runsc/mitigate/BUILD | 23 | ||||
| -rw-r--r-- | runsc/mitigate/mitigate_state_autogen.go | 3 | ||||
| -rw-r--r-- | runsc/mitigate/mitigate_test.go | 530 | ||||
| -rw-r--r-- | runsc/mitigate/mock/BUILD | 11 | ||||
| -rw-r--r-- | runsc/mitigate/mock/mock.go | 154 |
5 files changed, 3 insertions, 718 deletions
diff --git a/runsc/mitigate/BUILD b/runsc/mitigate/BUILD deleted file mode 100644 index 1238890fc..000000000 --- a/runsc/mitigate/BUILD +++ /dev/null @@ -1,23 +0,0 @@ -load("//tools:defs.bzl", "go_library", "go_test") - -package(licenses = ["notice"]) - -go_library( - name = "mitigate", - srcs = ["mitigate.go"], - visibility = [ - "//runsc:__subpackages__", - ], - deps = ["@in_gopkg_yaml_v2//:go_default_library"], -) - -go_test( - name = "mitigate_test", - size = "small", - srcs = ["mitigate_test.go"], - library = ":mitigate", - deps = [ - "//runsc/mitigate/mock", - "@com_github_google_go_cmp//cmp:go_default_library", - ], -) diff --git a/runsc/mitigate/mitigate_state_autogen.go b/runsc/mitigate/mitigate_state_autogen.go new file mode 100644 index 000000000..14bad0cd6 --- /dev/null +++ b/runsc/mitigate/mitigate_state_autogen.go @@ -0,0 +1,3 @@ +// automatically generated by stateify. + +package mitigate diff --git a/runsc/mitigate/mitigate_test.go b/runsc/mitigate/mitigate_test.go deleted file mode 100644 index 3bf9ef547..000000000 --- a/runsc/mitigate/mitigate_test.go +++ /dev/null @@ -1,530 +0,0 @@ -// Copyright 2021 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package mitigate - -import ( - "fmt" - "io/ioutil" - "strings" - "testing" - - "gvisor.dev/gvisor/runsc/mitigate/mock" -) - -// TestMockCPUSet tests mock cpu test cases against the cpuSet functions. -func TestMockCPUSet(t *testing.T) { - for _, tc := range []struct { - testCase mock.CPU - isVulnerable bool - }{ - { - testCase: mock.AMD8, - isVulnerable: false, - }, - { - testCase: mock.Haswell2, - isVulnerable: true, - }, - { - testCase: mock.Haswell2core, - isVulnerable: true, - }, - { - testCase: mock.CascadeLake2, - isVulnerable: true, - }, - { - testCase: mock.CascadeLake4, - isVulnerable: true, - }, - } { - t.Run(tc.testCase.Name, func(t *testing.T) { - data := tc.testCase.MakeCPUString() - set, err := NewCPUSet([]byte(data)) - if err != nil { - t.Fatalf("Failed to create cpuSet: %v", err) - } - - t.Logf("data: %s", data) - - for _, tg := range set { - if err := checkSorted(tg.threads); err != nil { - t.Fatalf("Failed to sort cpuSet: %v", err) - } - } - - remaining := set.GetRemainingList() - // In the non-vulnerable case, no cores should be shutdown so all should remain. - want := tc.testCase.PhysicalCores * tc.testCase.Cores * tc.testCase.ThreadsPerCore - if tc.isVulnerable { - want = tc.testCase.PhysicalCores * tc.testCase.Cores - } - - if want != len(remaining) { - t.Fatalf("Failed to shutdown the correct number of cores: want: %d got: %d", want, len(remaining)) - } - - if !tc.isVulnerable { - return - } - - // If the set is vulnerable, we expect only 1 thread per hyperthread pair. - for _, r := range remaining { - if _, ok := set[r.id]; !ok { - t.Fatalf("Entry %+v not in map, there must be two entries in the same thread group.", r) - } - delete(set, r.id) - } - - possible := tc.testCase.MakeSysPossibleString() - set, err = NewCPUSetFromPossible([]byte(possible)) - if err != nil { - t.Fatalf("Failed to make cpuSet: %v", err) - } - - want = tc.testCase.PhysicalCores * tc.testCase.Cores * tc.testCase.ThreadsPerCore - got := len(set.GetRemainingList()) - if got != want { - t.Fatalf("Returned the wrong number of CPUs want: %d got: %d", want, got) - } - }) - } -} - -// TestGetCPU tests basic parsing of single CPU strings from reading -// /proc/cpuinfo. -func TestGetCPU(t *testing.T) { - data := `processor : 0 -vendor_id : GenuineIntel -cpu family : 6 -model : 85 -physical id: 0 -core id : 0 -bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs taa itlb_multihit -` - want := Thread{ - processorNumber: 0, - vendorID: "GenuineIntel", - cpuFamily: 6, - model: 85, - id: threadID{ - physicalID: 0, - coreID: 0, - }, - bugs: map[string]struct{}{ - "cpu_meltdown": struct{}{}, - "spectre_v1": struct{}{}, - "spectre_v2": struct{}{}, - "spec_store_bypass": struct{}{}, - "l1tf": struct{}{}, - "mds": struct{}{}, - "swapgs": struct{}{}, - "taa": struct{}{}, - "itlb_multihit": struct{}{}, - }, - } - - got, err := newThread(data) - if err != nil { - t.Fatalf("getCpu failed with error: %v", err) - } - - if !want.SimilarTo(got) { - t.Fatalf("Failed cpus not similar: got: %+v, want: %+v", got, want) - } - - if !got.IsVulnerable() { - t.Fatalf("Failed: cpu should be vulnerable.") - } -} - -func TestInvalid(t *testing.T) { - result, err := getThreads(`something not a processor`) - if err == nil { - t.Fatalf("getCPU set didn't return an error: %+v", result) - } - - if !strings.Contains(err.Error(), "no cpus") { - t.Fatalf("Incorrect error returned: %v", err) - } -} - -// TestCPUSet tests getting the right number of CPUs from -// parsing full output of /proc/cpuinfo. -func TestCPUSet(t *testing.T) { - data := `processor : 0 -vendor_id : GenuineIntel -cpu family : 6 -model : 63 -model name : Intel(R) Xeon(R) CPU @ 2.30GHz -stepping : 0 -microcode : 0x1 -cpu MHz : 2299.998 -cache size : 46080 KB -physical id : 0 -siblings : 2 -core id : 0 -cpu cores : 1 -apicid : 0 -initial apicid : 0 -fpu : yes -fpu_exception : yes -cpuid level : 13 -wp : yes -flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc cpuid tsc_known_freq pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm invpcid_single pti ssbd ibrs ibpb stibp fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt arat md_clear arch_capabilities -bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs -bogomips : 4599.99 -clflush size : 64 -cache_alignment : 64 -address sizes : 46 bits physical, 48 bits virtual -power management: - -processor : 1 -vendor_id : GenuineIntel -cpu family : 6 -model : 63 -model name : Intel(R) Xeon(R) CPU @ 2.30GHz -stepping : 0 -microcode : 0x1 -cpu MHz : 2299.998 -cache size : 46080 KB -physical id : 0 -siblings : 2 -core id : 0 -cpu cores : 1 -apicid : 1 -initial apicid : 1 -fpu : yes -fpu_exception : yes -cpuid level : 13 -wp : yes -flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc cpuid tsc_known_freq pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm invpcid_single pti ssbd ibrs ibpb stibp fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt arat md_clear arch_capabilities -bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs -bogomips : 4599.99 -clflush size : 64 -cache_alignment : 64 -address sizes : 46 bits physical, 48 bits virtual -power management: -` - cpuSet, err := getThreads(data) - if err != nil { - t.Fatalf("getCPUSet failed: %v", err) - } - - wantCPULen := 2 - if len(cpuSet) != wantCPULen { - t.Fatalf("Num CPU mismatch: want: %d, got: %d", wantCPULen, len(cpuSet)) - } - - wantCPU := Thread{ - vendorID: "GenuineIntel", - cpuFamily: 6, - model: 63, - bugs: map[string]struct{}{ - "cpu_meltdown": struct{}{}, - "spectre_v1": struct{}{}, - "spectre_v2": struct{}{}, - "spec_store_bypass": struct{}{}, - "l1tf": struct{}{}, - "mds": struct{}{}, - "swapgs": struct{}{}, - }, - } - - for _, c := range cpuSet { - if !wantCPU.SimilarTo(c) { - t.Fatalf("Failed cpus not equal: got: %+v, want: %+v", c, wantCPU) - } - } -} - -// TestReadFile is a smoke test for parsing methods. -func TestReadFile(t *testing.T) { - data, err := ioutil.ReadFile("/proc/cpuinfo") - if err != nil { - t.Fatalf("Failed to read cpuinfo: %v", err) - } - - set, err := NewCPUSet(data) - if err != nil { - t.Fatalf("Failed to parse CPU data %v\n%s", err, data) - } - - for _, tg := range set { - if err := checkSorted(tg.threads); err != nil { - t.Fatalf("Failed to sort cpuSet: %v", err) - } - } - - if len(set) < 1 { - t.Fatalf("Failed to parse any CPUs: %d", len(set)) - } - - t.Log(set) -} - -// TestVulnerable tests if the isVulnerable method is correct -// among known CPUs in GCP. -func TestVulnerable(t *testing.T) { - const haswell = `processor : 0 -vendor_id : GenuineIntel -cpu family : 6 -model : 63 -model name : Intel(R) Xeon(R) CPU @ 2.30GHz -stepping : 0 -microcode : 0x1 -cpu MHz : 2299.998 -cache size : 46080 KB -physical id : 0 -siblings : 4 -core id : 0 -cpu cores : 2 -apicid : 0 -initial apicid : 0 -fpu : yes -fpu_exception : yes -cpuid level : 13 -wp : yes -flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc cpuid tsc_known_freq pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm invpcid_single pti ssbd ibrs ibpb stibp fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid xsaveopt arat md_clear arch_capabilities -bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs -bogomips : 4599.99 -clflush size : 64 -cache_alignment : 64 -address sizes : 46 bits physical, 48 bits virtual -power management:` - - const skylake = `processor : 0 -vendor_id : GenuineIntel -cpu family : 6 -model : 85 -model name : Intel(R) Xeon(R) CPU @ 2.00GHz -stepping : 3 -microcode : 0x1 -cpu MHz : 2000.180 -cache size : 39424 KB -physical id : 0 -siblings : 2 -core id : 0 -cpu cores : 1 -apicid : 0 -initial apicid : 0 -fpu : yes -fpu_exception : yes -cpuid level : 13 -wp : yes -flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc cpuid tsc_known_freq pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch invpcid_single pti ssbd ibrs ibpb stibp fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f avx512dq rdseed adx smap clflushopt clwb avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves arat md_clear arch_capabilities -bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs taa -bogomips : 4000.36 -clflush size : 64 -cache_alignment : 64 -address sizes : 46 bits physical, 48 bits virtual -power management:` - - const cascade = `processor : 0 -vendor_id : GenuineIntel -cpu family : 6 -model : 85 -model name : Intel(R) Xeon(R) CPU -stepping : 7 -microcode : 0x1 -cpu MHz : 2800.198 -cache size : 33792 KB -physical id : 0 -siblings : 2 -core id : 0 -cpu cores : 1 -apicid : 0 -initial apicid : 0 -fpu : yes -fpu_exception : yes -cpuid level : 13 -wp : yes -flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 - ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc cpuid tsc_known_freq pni pclmu -lqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowpr -efetch invpcid_single ssbd ibrs ibpb stibp ibrs_enhanced fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid r -tm mpx avx512f avx512dq rdseed adx smap clflushopt clwb avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves a -rat avx512_vnni md_clear arch_capabilities -bugs : spectre_v1 spectre_v2 spec_store_bypass mds swapgs taa -bogomips : 5600.39 -clflush size : 64 -cache_alignment : 64 -address sizes : 46 bits physical, 48 bits virtual -power management:` - - const amd = `processor : 0 -vendor_id : AuthenticAMD -cpu family : 23 -model : 49 -model name : AMD EPYC 7B12 -stepping : 0 -microcode : 0x1000065 -cpu MHz : 2250.000 -cache size : 512 KB -physical id : 0 -siblings : 2 -core id : 0 -cpu cores : 1 -apicid : 0 -initial apicid : 0 -fpu : yes -fpu_exception : yes -cpuid level : 13 -wp : yes -flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc cpuid extd_apicid tsc_known_freq pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm cmp_legacy cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw topoext ssbd ibrs ibpb stibp vmmcall fsgsbase tsc_adjust bmi1 avx2 smep bmi2 rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 clzero xsaveerptr arat npt nrip_save umip rdpid -bugs : sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass -bogomips : 4500.00 -TLB size : 3072 4K pages -clflush size : 64 -cache_alignment : 64 -address sizes : 48 bits physical, 48 bits virtual -power management:` - - for _, tc := range []struct { - name string - cpuString string - vulnerable bool - }{ - { - name: "haswell", - cpuString: haswell, - vulnerable: true, - }, { - name: "skylake", - cpuString: skylake, - vulnerable: true, - }, { - name: "amd", - cpuString: amd, - vulnerable: false, - }, - } { - t.Run(tc.name, func(t *testing.T) { - set, err := getThreads(tc.cpuString) - if err != nil { - t.Fatalf("Failed to getCPUSet:%v\n %s", err, tc.cpuString) - } - - if len(set) < 1 { - t.Fatalf("Returned empty cpu set: %v", set) - } - - for _, c := range set { - got := func() bool { - return c.IsVulnerable() - }() - - if got != tc.vulnerable { - t.Fatalf("Mismatch vulnerable for cpu %+s: got %t want: %t", tc.name, tc.vulnerable, got) - } - } - }) - } -} - -func TestReverse(t *testing.T) { - const noParse = "-1-" - for _, tc := range []struct { - name string - output string - wantErr error - wantCount int - }{ - { - name: "base", - output: "0-7", - wantErr: nil, - wantCount: 8, - }, - { - name: "huge", - output: "0-111", - wantErr: nil, - wantCount: 112, - }, - { - name: "not zero", - output: "50-53", - wantErr: nil, - wantCount: 4, - }, - { - name: "small", - output: "0", - wantErr: nil, - wantCount: 1, - }, - { - name: "invalid order", - output: "10-6", - wantErr: fmt.Errorf("invalid cpu bounds from possible: begin: %d end: %d", 10, 6), - }, - { - name: "no parse", - output: noParse, - wantErr: fmt.Errorf(`mismatch regex from possible: %q`, noParse), - }, - } { - t.Run(tc.name, func(t *testing.T) { - threads, err := GetThreadsFromPossible([]byte(tc.output)) - - switch { - case tc.wantErr == nil: - if err != nil { - t.Fatalf("Wanted nil err, got: %v", err) - } - case err == nil: - t.Fatalf("Want error: %v got: %v", tc.wantErr, err) - default: - if tc.wantErr.Error() != err.Error() { - t.Fatalf("Want error: %v got error: %v", tc.wantErr, err) - } - } - - if len(threads) != tc.wantCount { - t.Fatalf("Want count: %d got: %d", tc.wantCount, len(threads)) - } - }) - } -} - -func TestReverseSmoke(t *testing.T) { - data, err := ioutil.ReadFile("/sys/devices/system/cpu/possible") - if err != nil { - t.Fatalf("Failed to read from possible: %v", err) - } - threads, err := GetThreadsFromPossible(data) - if err != nil { - t.Fatalf("Could not parse possible output: %v", err) - } - - if len(threads) <= 0 { - t.Fatalf("Didn't get any CPU cores: %d", len(threads)) - } -} - -func checkSorted(threads []Thread) error { - if len(threads) < 2 { - return nil - } - last := threads[0].processorNumber - for _, t := range threads[1:] { - if last >= t.processorNumber { - return fmt.Errorf("threads out of order: thread %d before %d", t.processorNumber, last) - } - last = t.processorNumber - } - return nil -} diff --git a/runsc/mitigate/mock/BUILD b/runsc/mitigate/mock/BUILD deleted file mode 100644 index 5019ff9ee..000000000 --- a/runsc/mitigate/mock/BUILD +++ /dev/null @@ -1,11 +0,0 @@ -load("//tools:defs.bzl", "go_library") - -package(licenses = ["notice"]) - -go_library( - name = "mock", - srcs = ["mock.go"], - visibility = [ - "//runsc:__subpackages__", - ], -) diff --git a/runsc/mitigate/mock/mock.go b/runsc/mitigate/mock/mock.go deleted file mode 100644 index 12c59e356..000000000 --- a/runsc/mitigate/mock/mock.go +++ /dev/null @@ -1,154 +0,0 @@ -// Copyright 2021 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// Package mock contains mock CPUs for mitigate tests. -package mock - -import "fmt" - -// CPU represents data from CPUs that will be mitigated. -type CPU struct { - Name string - VendorID string - Family int - Model int - ModelName string - Bugs string - PhysicalCores int - Cores int - ThreadsPerCore int -} - -// CascadeLake2 is a two core Intel CascadeLake machine. -var CascadeLake2 = CPU{ - Name: "CascadeLake", - VendorID: "GenuineIntel", - Family: 6, - Model: 85, - ModelName: "Intel(R) Xeon(R) CPU", - Bugs: "spectre_v1 spectre_v2 spec_store_bypass mds swapgs taa", - PhysicalCores: 1, - Cores: 1, - ThreadsPerCore: 2, -} - -// CascadeLake4 is a four core Intel CascadeLake machine. -var CascadeLake4 = CPU{ - Name: "CascadeLake", - VendorID: "GenuineIntel", - Family: 6, - Model: 85, - ModelName: "Intel(R) Xeon(R) CPU", - Bugs: "spectre_v1 spectre_v2 spec_store_bypass mds swapgs taa", - PhysicalCores: 1, - Cores: 2, - ThreadsPerCore: 2, -} - -// Haswell2 is a two core Intel Haswell machine. -var Haswell2 = CPU{ - Name: "Haswell", - VendorID: "GenuineIntel", - Family: 6, - Model: 63, - ModelName: "Intel(R) Xeon(R) CPU", - Bugs: "cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs", - PhysicalCores: 1, - Cores: 1, - ThreadsPerCore: 2, -} - -// Haswell2core is a 2 core Intel Haswell machine with no hyperthread pairs. -var Haswell2core = CPU{ - Name: "Haswell2Physical", - VendorID: "GenuineIntel", - Family: 6, - Model: 63, - ModelName: "Intel(R) Xeon(R) CPU", - Bugs: "cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs", - PhysicalCores: 2, - Cores: 1, - ThreadsPerCore: 1, -} - -// AMD2 is an two core AMD machine. -var AMD2 = CPU{ - Name: "AMD", - VendorID: "AuthenticAMD", - Family: 23, - Model: 49, - ModelName: "AMD EPYC 7B12", - Bugs: "sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass", - PhysicalCores: 1, - Cores: 1, - ThreadsPerCore: 2, -} - -// AMD8 is an eight core AMD machine. -var AMD8 = CPU{ - Name: "AMD", - VendorID: "AuthenticAMD", - Family: 23, - Model: 49, - ModelName: "AMD EPYC 7B12", - Bugs: "sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass", - PhysicalCores: 4, - Cores: 1, - ThreadsPerCore: 2, -} - -// MakeCPUString makes a string formated like /proc/cpuinfo for each cpuTestCase -func (tc CPU) MakeCPUString() string { - template := `processor : %d -vendor_id : %s -cpu family : %d -model : %d -model name : %s -physical id : %d -core id : %d -cpu cores : %d -bugs : %s - -` - - ret := `` - for i := 0; i < tc.PhysicalCores; i++ { - for j := 0; j < tc.Cores; j++ { - for k := 0; k < tc.ThreadsPerCore; k++ { - processorNum := (i*tc.Cores+j)*tc.ThreadsPerCore + k - ret += fmt.Sprintf(template, - processorNum, /*processor*/ - tc.VendorID, /*vendor_id*/ - tc.Family, /*cpu family*/ - tc.Model, /*model*/ - tc.ModelName, /*model name*/ - i, /*physical id*/ - j, /*core id*/ - k, /*cpu cores*/ - tc.Bugs, /*bugs*/ - ) - } - } - } - return ret -} - -// MakeSysPossibleString makes a string representing a the contents of /sys/devices/system/cpu/possible. -func (tc CPU) MakeSysPossibleString() string { - max := tc.PhysicalCores * tc.Cores * tc.ThreadsPerCore - if max == 1 { - return "0" - } - return fmt.Sprintf("0-%d", max-1) -} |